    <SEC-DOCUMENT>0001193125-21-151437-index.html : 20210505
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    <ACCEPTANCE-DATETIME>20210505141032
    ACCESSION NUMBER:		0001193125-21-151437
    CONFORMED SUBMISSION TYPE:	S-1/A
    PUBLIC DOCUMENT COUNT:		6
    FILED AS OF DATE:		20210505
    DATE AS OF CHANGE:		20210505

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Blue Foundry Bancorp
    		CENTRAL INDEX KEY:			0001846017
    		STANDARD INDUSTRIAL CLASSIFICATION:	SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED [6036]
    		IRS NUMBER:				000000000
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		S-1/A
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-254079
    		FILM NUMBER:		21892576

    	BUSINESS ADDRESS:
    		STREET 1:		19 PARK AVENUE
    		CITY:			RUTHERFORD
    		STATE:			NJ
    		ZIP:			07070
    		BUSINESS PHONE:		201-939-6600

    	MAIL ADDRESS:
    		STREET 1:		19 PARK AVENUE
    		CITY:			RUTHERFORD
    		STATE:			NJ
    		ZIP:			07070
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>S-1/A
    <SEQUENCE>1
    <FILENAME>d130240ds1a.htm
    <DESCRIPTION>S-1/A
    <TEXT>
    Document 1 - file: d130240ds1a.htm

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    <SEQUENCE>2
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 2 - file: g130240dsp003.jpg

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    <DOCUMENT>
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    <SEQUENCE>3
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 3 - file: g130240g0305082402208.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>g130240g57s82.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 4 - file: g130240g57s82.jpg

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    <DOCUMENT>
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    <SEQUENCE>5
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 5 - file: g130240g65i24.jpg

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    <DOCUMENT>
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    <SEQUENCE>6
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    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g130240g89h28.jpg

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